59 citations · 154 across the 9 of their papers we have counts for
9 papers
Black hole spectral instabilities in the laboratory: Shallow water analogue
Mateus Malato Corrêa, Caio F. B. Macedo, Rodrigo Panosso Macedo +1
Small deviations in the spacetime around black holes can lead to instabilities in the underlying quasinormal mode spectrum, potentially altering the hierarchy of its overtones. A p…
Ergoregion instability in a fluid with vorticity
Leandro A. Oliveira, Carolina L. Benone, Luís C. B. Crispino
We investigate perturbations in a rotational and incompressible fluid flow. Interested in the phenomenon analogous to the black hole ergoregion instability, we verify the influence…
Analytical investigation of wave absorption by a rotating black hole analogue
Leandro A. Oliveira, Carolina L. Benone, Amanda L. Almeida +1
Perturbations in a draining vortex can be described analytically in terms of confluent Heun functions. In the context of analogue models of gravity in ideal fluids, we investigate…
Ergoregion instability of a rotating quantum system
Leandro A. Oliveira, Luis J. Garay, Luís C. B. Crispino
Using the analogy between acoustic perturbations in an ideal fluid and the description of a Klein-Gordon scalar field in a curved spacetime, we study the quasinormal modes of a qua…
Quasinormal modes of the polytropic hydrodynamic vortex
Leandro A. Oliveira, Vitor Cardoso, Luís C. B. Crispino
Analogue systems are a powerful instrument to investigate and understand in a controlled setting many general-relativistic effects. Here, we focus on superradiant-triggered instabi…
Tidal Forces in Reissner-Nordström Spacetimes
Luís C. B. Crispino, Atsushi Higuchi, Leandro A. Oliveira +1
We analyze the tidal forces produced in the spacetime of Reissner-Nordström black holes. We point out that the radial component of the tidal force changes sign just outside the eve…